FFmpeg Command line syntax

See http://rodrigopolo.com/ffmpeg/cheats.html

-target

A target can have 3 prefixes: pal-, ntsc-, film- these prefix have following presets:

• pal-
  • frame_rate = 25
• ntsc-
  • frame_rate = 30000/1001
• file-
  • frame_rate = 24000/1001

The suffix sets following presets:

• vcd
• dvd
  • opt_video_codec("mpeg2video");
  • opt_audio_codec("ac3");
  • opt_format("dvd");
  • opt_frame_size(norm == PAL ? "720x576" : "720x480");
  • opt_frame_rate(NULL, frame_rates[norm]);
  • opt_default("g", norm == PAL ? "15" : "18");
  • opt_default("b", "6000000");
  • opt_default("maxrate", "9000000");
  • opt_default("minrate", "0"); //1500000;
  • opt_default("bufsize", "1835008"); //224*1024*8;
  • opt_default("packetsize", "2048"); // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
  • opt_default("muxrate", "10080000"); // from mplex project: data_rate = 1260000. mux_rate = data_rate * 8
  • opt_default("ab", "448000");
  • audio_sample_rate = 48000;

...

Cmd line from lxp for x264 :

ffmpeg -vcodec libx264 -s hd480 -r 25 -vpre hq -crf 15 -threads 0 -acodec libmp3lame -ac 2 -ar 44100 -ab 128k FILE.avi

Main Options: -vcodec libx264 -vpre hq -crf 15 -threads 0 -acodec libmp3lame -ac 2 -ar 44100 -ab 128k

you can also use -vpre default if you want faster encoding speed and -crf 18 or even higher if you want lower bitrate

(22:54:47) lxp: it would be really great if there is a custom mode where you can enter a custom resolution, ratio and ffmpeg options

(23:02:45) lxp: maybe you know avidemux, it uses libavcodec directly and has all these x264 options in the gui

(23:05:45) lxp: i also used kdenlive recently, it has default profiles for many export formats and also lets the user specify profiles, but only through a single configuration textbox

(23:08:48) lxp: by the way, one additional thing to the above ffmpeg command: you shouldn't drop the -threads 0 option (23:08:59) lxp: this lets ffmpeg choose the thread count based on the cpu count. i think the default is only 1 thread

ffmpeg versions

Versions as of 8.1.2010

Ubuntu:

• 10.04LTS (lucid): 4:0.5.1-1ubuntu1
• 10.10 (maverik) : 4:0.6-2ubuntu6

Debian

• lenny (stable): 0.svn20080206-18+lenny1
• squeeze (testing): 4:0.5.2-6: amd64
• sid (unstable): 4:0.5.2-6
• experimental: 4:0.6.1-2
• debian-multimedia.org/testing+unstable: 5:0.6.1+svn20101128-0.1